java 回调与枚举

package miui.maml.elements;

import android.util.Log;

import miui.maml.ScreenElementRoot;

import org.w3c.dom.Element;

public class ScreenElementFactory {
    public interface FactoryCallback {
        public ScreenElement onCreateInstance(Element ele, ScreenElementRoot root);
    }

    private FactoryCallback mFactoryCallback;

    public void setCallback(FactoryCallback factoryCallback) {
        mFactoryCallback = factoryCallback;
    }

    public FactoryCallback getCallback() {
        return mFactoryCallback;
    }

    public ScreenElement createInstance(Element ele, ScreenElementRoot root) {
        String tag = ele.getTagName();
        try {
            if (tag.equalsIgnoreCase(ImageScreenElement.TAG_NAME))
                return new ImageScreenElement(ele, root);
            else if (tag.equalsIgnoreCase(TimepanelScreenElement.TAG_NAME))
                return new TimepanelScreenElement(ele, root);
          
            else if (mFactoryCallback != null)
                return mFactoryCallback.onCreateInstance(ele, root);
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
            Log.w("ScreenElementFactory", "fail to create element." + e);
        }
        return null;
    }
}

/**
 * 这个类是可以通过工厂方法进行重构的
 * 每一个检测项是一个类，比如 AirModeCheckItem , WifiIsConnectCheckItem,.......他们实现共同的inferface，
 * 这个inferface包含itemName等变量，还有checkItem，fixItem等方法
 * 有一个CheckItemFactory管理他们
 */
public enum NetworkDiagoneItem {

    APN_ISSUE("checkAPN","APN扫描...", "建议重置APN",false, "重置APN","fixAPN"),
    SIM_STATE_ISSUE("checkSimState","SIM卡状态扫描...", "检查是否禁用了sim卡",false, "去检查","fixAPN"),
    SIGNAL_STRENGTH_ISSUE("checkSignalStrength","信号强度扫描...", "当前环境信号较差",false, "确定","fixSignalStrength"),
    WIFI_NOT_CONNECT("checkWlanConnected","wifi接入点扫描...","去连接wifi",false,"请连接一个wifi","fixWlanConnected"),
    WIFI_ROUTE_TO_INTERNET("checkRouteToInternet","路由器连接外网扫描...","去检测路由器设置",false,"去检测路由器设置","fixRouteToInternet"),
    WIFI_DNS_ISSUE("checkWlanDNSAvailable","ADSL DNS 扫描...","WIFI DNS",false,"修复","fixAPN"),
    WIFI_GATEWAY_ISSUE("checkRouteGetwayAvailable","Wifi网关扫描...", "建议检查路由器设置",false, "网关不能访问","fixRouteGetwayAvailable"),
    USB_SHARENET_ISSUE("checkUsbSharenetRoute","USB共享上网扫描...", "建议检查路由器设置",false, "网关不能访问","fixUsbSharenetRoute");

   
    public static List<NetworkDiagoneItem> getAllUsbShareItem() {
        List<NetworkDiagoneItem> usbshareItems = new ArrayList<NetworkDiagoneItem>();
        usbshareItems.add(USB_SHARENET_ISSUE);
        return usbshareItems;
    }


    private String itemCheckMethod;
    private String itemName;
    private String itemSummary;
    private boolean isOk;
    private String itemSolution;
    private String solutionMethod;

    public static int CurrentSignalStrength = 0;

    private NetworkDiagoneItem(String itemCheckMethod,String itemname,String itemSummary, boolean isOk, String itemSolution,String solutionMethod) {
        //mContext = context;
        this.itemCheckMethod = itemCheckMethod;
        this.itemName = itemname;
        this.itemSummary = itemSummary;
        this.isOk = isOk;
        this.itemSolution = itemSolution;
        this.solutionMethod = solutionMethod;
    }